{
  "manageEntity": {
    "action": "Save",
    "entityId": "2144956861",
    "entityType": "Track",
    "nonce": "0x62238684e49970707844f0f21bd609431dc53a49a18f09b3c069f72a5ba543cb",
    "signature": "0x2d1e04ceb53127731bb045dd87a8e6d1eec6b4199c2d2177777cf18617d624d421f5cb3c6b04029feea5891c91363f7dd8d66d20d26e9712c2a6cbeb70ad89d71b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}